Lubricating emulsion



Patented 5.... 5, 1922.

PATENT J'UDSON A. DE OEW, OF MOUNT VERNON, NEW YORK.

,fI-UBBICATING EMULSION.

Ho'Drawing. application file l I8, 1919, Serial No. 291,080. Renewed January 26, 1922. Serial .in g Emulsions,-of which the following is a specification.

The following invention relates to 1mprovements in the lubricating value of emulsions used in machine shops on cutting tools.

Although aqueous emulsions are used to'cool and lubricate cutti'ngdzools with fairly satisfactory results, I have discovered that owing to the very high pressure at the point of the tool and the high temperatures reached at the cutting edge, the lubricating value .of

the oil particles is-not as great as it might be, because the viscosity of the oil so greatly reduced by these high temperatures when it actually comes between the metal and the edge of the tool, that it is only able 7 I to" partially reduce the friction existing at thissurface. The object of this invention is to attach to the oily particles in the emulsion, certain solid lubricants which will be carried with the emulsion to the oint of contact between the cutting tool and the work andthis will supply the means for keeping .the surfaces In ricated irrespective 'of the high tempera tures end pressures existing at the. edge of the tool. s 1? To accomplish this result, I use in the emulsifying process, a small a very fine graphite or other solid or colloidal lubricant. The solid lubricant is mixed with the oil and then emulsified by any of the methods that have been described heretofore, the'object being to produce a special kind of. emulsion in which there are two liquid and one solid phases and in .which the distribution is uniform. I am awarethat colloidal graphite has been used, blended quantity of with oil'to improve its lubricating properties and also that suspensions of graphite in water have been used for lubrication but I believe that it is a new invention to produce umform emulsions in which both oil and graphite are dispersed in an aqueous medium. K

I do not limit myself to the use of graphite as other solid lubricants such as talc may be employed. A specific example is as follows: Three ounces of graphite and six ounces of talc are completely mixed in two gallons of oil. This/mixture is then put in a measuring tank and emulsified into one hundred gallons of water.

"What I claim as m invention is:

1. A lubricating dilute emulsion of a water insoluble solid and water insoluble liquid particles dispersed in an aqueous medium the solid particles, being enclosed by the liquid particles. K

2. A dilute emulsion having therein a waterinsoluble oil, graphite and water, the graphite particles being enclosed by the oil particles.

3. A dilute emulsion having therein a water insoluble oil, a water insoluble solid lubricant and water, the solid particles being enclosed by the liquid particles.

4, Anew lubricating product comprising particles of a water insoluble oil highly dispersed in an aqueous medium and enclosin minute particles of. water insoluble soli lubricant.

5. A process of making emulsions contain- ,in an unemulsified water insoluble solid specification this 16th day of Aprilv 1919.

JUDSON A. DE GEW. 

